Sliding mechanisms and systems

ABSTRACT

A sliding mechanism for extending and retracting a slide-out compartment comprising a guide member having two securing flanges separated by a gap that communicates with an interior channel. A slider rail is disposed within the interior channel and has a middle portion adapted with a plurality of holes formed therein. Extending from the middle portion are two securing members that cooperate with the securing flanges of the guide member to maintain slider rail within the interior channel as middle portion extends into the gap. Disposed within the interior channel at one end of the guide element is a gear mechanism. The gear mechanism includes a gear shaft and a gear attached to the gear shaft. The gear mechanism drivingly engages a plurality of teeth on the gear within the plurality of holes in the middle portion of the slider rail to extend or retract the slide-out compartment. A timing assembly is attached to the gear shaft to allow two or more gear shafts to be timed relative to one another. Attached to the second end of the gear shaft is a manual activation assembly, such as a hand crank. Alternatively, a motorized activation assembly may be attached to gear shaft. One embodiment of the motorized activation assembly includes a quick-release arrangement that allows a motor to be quickly and easily released from the gear shaft or a motorized activation assembly.

BACKGROUND OF THE INVENTION

1. The Field of the Invention

The present invention generally relates to a device for sliding objects in a controlled manner, and, more specifically, to a sliding mechanism for a “slide-out” compartment or room for a recreational vehicle, such as a camper, trailer, motor home, or the like.

2. The Prior State of the Art

Recreational vehicles (RVs), such as travel trailers, campers, and motor homes offer users the opportunity to escape the rigors of everyday life and explore the world we live in. Resembling a small home on wheels, an RV is capable of transporting and comfortably sheltering people for extended periods of time. The primary benefit of such a vehicle is to enhance the camping or traveling experience by providing the comforts of home away from home. Additionally, the occupant is given the option of braving the elements, commonly known as “roughing it”, or retreating to the protection afforded by the RV. Thus, the spirit of “roughing it” may be maintained without deprivation of the full camping experience.

Although freely mobile, as the size of RV's increase, the ease of handling tends to decrease. Additionally, RV's have dimensional limits dictated by highway regulations or the specific configuration of truck bed that contains the camper. Responding to the need for more living space inside a smaller vehicle, numerous different RVs incorporate pop-up tops and/or slide-out rooms for selectively expanding the living area. Designed to be used only when the RV is parked, these rooms are retracted and stored in the interior of the vehicle during travel, and are slid outwardly when the vehicle is parked. Generally, upon parking the recreational vehicle, the pop-up tops or slide-out rooms are moved horizontally to an extended position to increase the useable interior space of the vehicle.

Several different devices have been proposed for use as slide-out rooms. Included among those proposed are expandable camper bodies and enclosures, and slidable room assemblies for RVs. Envisioned for recreational vehicle use, some older slide-out devices generally include accordion-like side walls laterally joined to a rigid end wall. Supporting the walls is a slidable frame carried on the main RV frame to slidably extend and retract from and within the main RV frame. Traditionally, a manually operated or motorized driving mechanism interconnects between the sliding frame and the main frame for expansion and retraction of the slide-out.

The trend in the RV industry over the last several years concerning slide-out rooms has been to incorporate the entire slide-out assembly within the main frame of the RV. This trend, has led to the use of sliding tubes or beams that are attached to or integrally formed with the main frame of the RV. The associated driving mechanism is attached to the main frame or in close proximity thereto. However, the components forming the slide out mechanism tend to be scattered within the interior of the RV with the motor in one location, the driving mechanism encompassing another interior region, and the load bearing members extending across a substantial part of the interior of the RV. As such, the drive mechanisms and other components associated with these sliding mechanisms have become more complex and costly to install, repair, and/or replace.

Driving mechanisms for RV slide-out rooms, that are currently available, function in many different forms. They tend to, however, generally share many of the same functional and structural characteristics. One variation of slide-out drive mechanisms involves the use of threaded drive screws to drive racks and pivoted cross-members that extend or retract the slide-out room. Another type of drive mechanism uses toothed geared drive assemblies having racks that expand or contract upon rotation of a toothed gear. Unfortunately, during the rigors of travel, the racks may become disengaged from the gears thereby preventing the slide-out room from being extended or retracted.

Further efforts to provide drives for slide-out rooms have led to the use of hydraulic cylinders. Resembling horizontally installed hydraulic jacks, these mechanisms slidably force the room open as the hydraulic jack extends. Likewise, the hydraulic cylinder can slidably close the room. Although straightforward in design, hydraulic systems often tend to be fragile in nature and being subject to deleterious rigors of vibration in the transport of the RV over the roadway can experience a relatively short service life.

Though these various devices solve many problems, they still require a significant amount of space within the recreational vehicle for the motor and drive mechanism. While motor home type RV's have substantial amounts of space to accommodate the required motors and driving mechanisms, the space within camper and trailer type RV's is at a premium and limits the application of currently slide-out room technology. For example, in motor home type slide-out rooms, the trend is to include a drive mechanism that extends from one side of the motor home to the other to provide the necessary load bearing strength. This technique is inoperable for camper type RV's because a camper slide-out room must slide out from a small wing wall that extends over the side of a pick-up. To allow an individual to use the camper, the driving mechanism may not extend into the central isle of the camper, and therefore must be limited to the dimensional restrictions of the wing wall. Furthermore, people still desire access to the interior of the camper when the slide-out room is retracted. Consequently, the slide-out room and associated driving mechanism cannot substantially block the interior isle. As such, it would be beneficial to reduce the space required for the motor and drive mechanism of a slide-out room for motor homes, and especially campers and trailers.

Another problematic characteristic often shared by prior art drive mechanism designs is the intended location of the operating mechanism. Slide-out driving mechanisms are usually installed as original equipment during manufacture of the RV. Termed “OEM” equipment, the installation locations of these devices is often chosen without consideration of the fact that it may be desirable to subsequently gain access to such mechanisms for repair and/or replacement. As a result, the devices are often incorporated within the confines of the main frame of the RV making repairs costly and replacement nearly impossible.

Additionally, with current slide-out room construction a relatively large gap is created between the slide-out room and the RV body when the slide-out room is extended. During use under adverse weather conditions, such as wind, rain, sleet, or snow, water tends to leak into the interior of the vehicle in the area between the slide-out room and the exterior wall of the vehicle. Current approaches to solving this problem involve filling the gap with a sealer to prevent infiltration of inclement weather. Unfortunately, since the gap between the bottom of the slide-out room and the RV body is large, the effectiveness of the sealer is limited. Furthermore, since the sealing material is less durable than other portions of the RV, overtime, the larger sealers tend to deteriorate, thereby allowing wind, rain, sleet, or snow to creep into the drive mechanisms of the slide-out room or to damage the walls of the RV body.

Another problem with current RV mechanisms occurs once the RV has been in use for a period of time. During construction of an RV, the slide-out room is adjusted to properly fit the sidewalls and cooperate with the slide mechanisms. During use, however, the dimensions of the slide-out room and the body of the recreational vehicle may change due to a number of conditions. Current construction techniques and slide mechanisms make it difficult to readjust the fit of the slide-out room relative to the vehicle's sidewalls and floors, thereby providing inefficient sliding, binding, and damage to the sides and floor of both the slide-out room and the body of the recreational vehicle.

It would be an advance to provide RV mechanisms for sliding a slide-out room on a recreational vehicle, such as a camper, trailer, motor home, or the like, that is compact, reliable, while reducing the possibility of infiltration of adverse weather conditions within the interior of the RV. In particular, it would be and advance to provide a sliding systems that incorporates sliding mechanisms, driving mechanisms, and structural support elements within a single unit, that requires little space for installation and use, while being reliable.

OBJECTS AND SUMMARY OF THE INVENTION

It is an object of the present invention to provide a sliding mechanism and system for moving a slide-out compartment of a recreational vehicle that is compact while maintaining the required strength and rigidity.

It is another object of the present invention to provide a sliding mechanism and system that provides additional structural support to the exterior wall of a recreational vehicle.

Another object of the present invention is to provide a sliding mechanism and system that that may be activated manually to extend and retract a slide-out compartment of a recreational vehicle.

Yet another object of the present invention is to provide sliding mechanisms and systems that are capable being easily modified to accommodate for changes in the structural dimensions of the recreational vehicle.

Still yet another object of the present invention is to provide a sliding mechanism and system that is capable of being utilized on various types of recreational.

Another object of the present invention is to provide a sliding mechanism and system that minimizes the space required for both installation and use of the sliding mechanism on various types of recreational vehicles.

Still another object of the present is to provide a sliding mechanism and system that cooperates with seals to prevent infiltration of adverse weather conditions within the interior of various types of recreational vehicle.

Additional objects and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by the practice of the invention. The objects and advantages of the invention may be realized and obtained by means of the instruments and combinations particularly pointed out in the appended claims.

To achieve the foregoing objects, and in accordance with the invention as embodied and broadly described herein, a sliding mechanism for extending and retracting a slide-out compartment is disclosed. The sliding mechanism includes a guide member having two securing flanges separated by a gap that is in communication with an interior channel. A slider rail is disposed within the interior channel and has a middle portion adapted with a plurality of holes formed therein. Extending from the middle portion are two securing members that cooperate with the securing flanges of the guide member to maintain slider rail within the interior channel as middle portion extends into the gap. Disposed within the interior channel at one end of the guide element is a gear mechanism. The gear mechanism drivingly engages with the plurality of holes in the middle portion of the slider rail to extend or retract the slide-out compartment. As such, in one embodiment, gear mechanism includes a gear shaft and a gear attached to the gear shaft. The gear includes a plurality of teeth that extend into the gap between the securing members to engage with the holes in the middle portion of the slider rail. In this configuration, the slider rail is continuously maintained in the interior channel and the teeth are in continuous engagement with the slider rail. This prevents the teeth from disengaging from the slider rail and being incapable of moving slide-out compartment.

According to another aspect of the present invention, the gear shaft is adapted to cooperate with one or more activation assemblies. In one embodiment, the activation assembly is a manual activation assembly. The manual activation assembly includes a connector member that is adapted to attach to one end of the gear shaft. Located at another end of the connector member is a hand crank. As the hand crank is rotated, the connector member is rotated, thereby activating the gear mechanism to extend or retract the slide-out compartment.

In another embodiment, the activation assembly is a motorized activation assembly. The motorized activation assembly includes a quick-release arrangement that allows a motor to be engaged and disengaged through rotation of a cam lever. Motorized activation assembly allows a motor to communicate with the gear shaft to thereby allow the motor to extend and retract the slide-out compartment. Additionally, when the sliding mechanism includes two connected gear shaft, with a manual activation assembly coupled to one gear shaft and a motorized activation assembly coupled to the other gear shaft, activation of the quick-release arrangement releases engagement of the motor with one gear shaft thereby allowing operation of the manual activation assembly. In one embodiment, the two gear shafts can be coupled together by a timing assembly. The timing assembly includes a detachable drive shaft that is capable of engaging and disengaging to the two gear shafts independently of each other.

In another embodiment of the present invention, a system for extending and retracting a slide-out compartment incorporated within a recreational vehicle is disclosed. The system includes a base assembly that is adapted for fixably attachment to the recreational vehicle. The base assembly includes the guide element and a number of support elements that combine to provide structural support to both the slide-out compartment and the remaining parts of the recreational vehicle. The base assembly cooperates with the sliding mechanism to allow a slide-out compartment to be extended and retracted. In one embodiment of the sliding system, two slider rails are attached together through two slider supports.

BRIEF DESCRIPTION OF THE DRAWINGS

In order that the manner in which the above recited and other advantages and objects of the invention are obtained, a more particular description of the invention briefly described above will be rendered by reference to specific embodiments thereof that are illustrated in the appended drawings. Understanding that these drawings depict only typical embodiments of the invention and are therefore not to be considered limiting of its scope, the invention will be described with additional specificity and detail through the use of the accompanying drawings in which:

FIG. 1 is a partial breakaway perspective view of one embodiment of a vehicle and camper within one embodiment of the sliding system of the present invention.

FIG. 2 is a perspective view of one embodiment of a sliding system.

FIG. 3 is an exploded perspective view of one embodiment of a base assembly of the sliding system of FIG. 2.

FIG. 4 is an exploded perspective view of one embodiment of a sliding assembly of the sliding system of FIG. 2.

FIGS. 5A and 5B are partial perspective views of embodiments of a slider rail for one embodiment of the sliding assembly of FIG. 4.

FIG. 6 is an exploded perspective view of one embodiment of a roller assembly of the sliding system of FIG. 2.

FIG. 7 is an exploded perspective view of one embodiment of a gear mechanism of the sliding system of FIG. 2.

FIG. 8 is partial cross-sectional view of the gear mechanism of FIG. 7 installed in a base assembly of FIG. 3.

FIG. 9 is a plan view of the sliding system of FIG. 2.

FIG. 10 is an end view of one embodiment of a first end of a drive shaft of the sliding system of FIG. 2.

FIG. 11 is an end view of one embodiment of a second end of a drive shaft of the sliding system of FIG. 2.

FIG. 12 is an exploded perspective view of one embodiment of a motorized assembly that can be used with the sliding system of FIG. 2.

FIG. 13 illustrates a cross-sectional view of one embodiment of a quick-release arrangement having a cam member in a cammed.

FIG. 14 illustrates a cross-sectional view of the embodiment of a quick-release arrangement of FIG. 13 with the cam member in an uncammed.

FIG. 15 is an exploded perspective view of a portion of the quick release arrangement of FIG. 13.

FIG. 16 illustrates a cross-sectional view that depicts the relative positions of the cam member and a second end of a second gear, in the cammed orientation, of the quick-release arrangement of FIG. 13.

FIG. 17 illustrates a cross-sectional view that depicts the relative positions of the cam member and a second end of a second gear, in the uncammed orientation, of the quick-release arrangement of FIG. 13.

FIG. 18 is an exploded perspective view of another embodiment of a cam member that is adapted to be added to an existing motorized activation assembly.

FIG. 19A is a cross-sectional view of another embodiment of a slider rail

FIG. 19B is a cross-sectional view of another embodiment of a slider rail.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

The present invention relates to sliding mechanisms and systems which may be used to extend and retract a slide-out compartment incorporated within a recreational vehicle, such as but not limited to campers, trailers, motor homes, and the like. The sliding mechanism is configured to be compact, while being capable extending and retracting variously sized slide-out rooms or compartments to increase the living space within a recreational vehicle. Furthermore, the sliding mechanism and systems of the present incorporate numerous sliding and driving components into a single unit thereby making installation simpler and quicker, while maintaining structural support and providing additional structural support to the recreational vehicle. Additionally, the sliding mechanisms and systems are capable of being installed on various recreational vehicles and at varying locations on the recreational vehicle without the need to substantially alter any portion of the mechanisms or components. As such, the sliding mechanisms and systems of the present invention are interchangeable or may be used without modification for slide-out rooms or compartments on the right, left, front, or rear of the recreational vehicle.

Generally, the sliding mechanisms and systems shall be described hereinafter with reference to a camper that is contained within the bed of a pick-up truck. The discussion relating to application of the present invention to campers should not be considered as limiting the application of the general principals of the invention to other types of recreational vehicle, such as trailers and motor homes. Additionally, reference is made herein to a single slide-out compartment; however, it can be appreciated by one skilled in the art that multiple slide-out compartments may be incorporated within a single recreational vehicle.

FIG. 1 depicts a vehicle 10 with a cab 12 and a vehicle bed (not shown) that supports a camper 18. As shown, camper 18 has a forward portion 20 that extends over cab 12 of vehicle 10 and a rear portion 22 that extends beyond the rear of vehicle 10. Camper 18 has a step configuration formed with a lower exterior wall 24 retained within the interior of the bed (not shown) and an upper exterior wall 26 that is located above the bed (not shown). Lower exterior wall 24 and upper exterior wall 26 are joined together by way of a wing wall 28 (FIG. 2) that extends over a side 16 of vehicle 10. As depicted in FIG. 1, in one embodiment camper 18 includes a slide-out room or compartment 30. As illustrated, in one embodiment, slide-out compartment 30 is located intermediate between forward portion 20 and rear portion 22 of camper 18. Slide-out compartment 30, however, may be located at the forward portion or rearward portion of the side of camper 18. Alternatively, slide-out compartment 30 may be located at the front or rear of camper 18. Furthermore, camper 18 may include a multiple number of slide-out compartments 30 which are located at the front, rear, and/or on both sides of camper 18.

According to one aspect of the present invention, slide-out compartment 30 is extended and retracted by way of a sliding system, as referenced by numeral 40 in FIG. 2. The configuration of sliding system 40 minimizes the space required for installation and usage of sliding system 40 to extend and retract slide-out compartment 30, thereby increasing the available living area while providing the requisite strength and functionality to operate slide-out compartment 30.

Sliding system 40 includes a base assembly 42, a gear mechanism 44, and a slider assembly 46. As depicted in FIG. 2, base assembly 42 is attached to wing wall 28 of camper 18. Base assembly 42 is configured to both provide structural support for gear mechanism 44 and slider assembly 46, while providing structural support to camper 18.

Additionally, base assembly 42 is adapted to form the central unit of sliding system 40 upon which gear mechanism 44 and slider assembly 46 may be attached and to which portions of camper 118 are affixed.

One embodiment of base assembly 42 includes support elements 50 that provided structural support to both sliding system 40 and camper 18. Attached to support elements 50 are optional feet 52 (FIG. 3) that are capable of assisting in leveling and attaching support elements 50 to camper 18. As illustrated in FIG. 2, also attached to support element 50 are a number of guide members 54 that cooperate with gear mechanism 44 and slider assembly 46 to allow slide-out room 30 to be retracted or extended as required.

In the case of use with camper 18 (FIG. 1), base assembly 42 is sized so that when support elements 50 are coupled to wing wall 28, the location of support elements 50 on wing wall 28 coincides with the top of lower exterior wall 24 and the bottom portion of upper exterior wall 26. Base assembly 42, and therefore support elements 50, provide structural support to camper 18.

As depicted in both FIG. 2 and 3, each support element 50 has a generally U-shaped cross-section having an outer portion 60 and an inner portion 62 that are separated by a base portion 64. Outer portion 60 and inner portion 62 have a spaced apart relationship that allows attachment of guide members 54, while giving strength to base assembly 42. As shown in FIG. 2, support elements 50 are capable of being attached to wing wall 28, while also attaching to lower exterior wall 24 and upper exterior wall 26. As such, the cross-sectional configuration of support element 50 may be varied as necessary dependent on the particular use thereof, such that support element 50 may have a cross-section in the configuration of a square, rectangular, oval, trapezoidal, or the like, or combinations thereof.

As depicted in FIG. 3, inner portion 62 includes a plurality of feet fastening holes 66 through which optional feet 52 may be coupled thereto. In one embodiment, both base portion 64 and outer portion 60 include numerous fastening holes 68 which are configured to allow portions of camper 18 to be attached to support element 50. By way of example, and not limitation, fastening holes 68 in outer portion 60 may be sized to allow fasteners to attach outer portion 60 to upper exterior wall 26, while fastening holes 68 in base portion 64 may be sized to allow fasteners to attach base assembly 42 to wing wall 28. It will be appreciated that the number, size, and dimensions of feet fastening holes 66 and fastening holes 68 may be varied as needed. In addition, feet fastening holes 66 and fastening holes 68 may have various other configurations that are not illustrated in FIG. 3. By way of example and not limitation, feet fastening holes 66 and fastening holes 68 may be round, oval, elliptical, elongated, square, triangular, rectangular, or the like.

Support element 50 may be composed of various types of materials, such as by way of example and not limitation, metals, composites, plastics, or the like, as long as the material used is capable of providing support to the other components of the present invention, while giving structural support to camper 18. In one embodiment, support element 50 is substantially composed of steel.

In one embodiment, feet 52 are releasably attached to support element 50. It will be appreciated by one skilled in the art that feet 52 are an optional feature of sliding system 10. Siding system 10 is equally effective without feet 52. Feet 52 allow support element 50 to be leveled with respect to wing wall 28 and the other components and dimensions of camper 18, such as lower and upper exterior walls 24, 26, respectively. Additionally, feet 52 are particularly useful as the camper ages, because feet 52 may be utilized to assist with eliminating problems such as the camper not being level. Furthermore, feet 52 may be used to compensate for defects in the construction of camper 18 that would otherwise affect the sliding motion of slider system 40. In one embodiment, feet 52 have a generally L-shaped cross-section. As depicted in FIG. 3, feet 52 have a first foot portion 70 adapted to couple to support element 50 at feet fastening holes 66, while a second foot portion 72 is adapted to couple to wing wall 28. Each foot portion 70, 72 includes a number of apertures 74 which are adapted to cooperate with numerous types of fastener (not shown) to allow secure attachment of feet 52 to either wing wall 28 or support element 50. Additionally, in one embodiment, each aperture 74 has an ovular or slotted form to allow adjustment of support elements 50 and feet 52.

In view of the teaching contained herein, one skilled in the art can identify various other configurations of feet 52 which are capable of performing the function thereof. By way of example and not imitation, each foot 52 may have various other cross-sectional configuration, such as square, rectangular, or the like. Additionally, in an another configuration, feet 52 are integrally formed with support element 50 and washers slidably engages with a fastener to vary the distance between each second foot portion 72 and wing wall 28. In another configuration, feet 52 are in the form of a post or cylindrical member that has a threaded portion encompassing the exterior surface thereof. The threaded portion cooperates with a complementary threaded portion formed in support element 50, to thereby level base assembly 42. In yet another configuration, feet 52 may have the form of a post or cylindrical member that is spring-loaded to maintain separation between wing wall 28 and second foot portion 72.

As shown in FIG. 2, guide member 54 is attached to support element 50. Guide member 54 separates and gives structural support to support elements 50, thereby providing structural integrity to base assembly 42. Guide member 54, additionally, cooperates with slider assembly 46 and gear mechanism 44 to allow slider assembly 46 to be extended and retracted during operation of sliding system 40.

In one embodiment, guide member 54, shown in greater detail in FIG. 3, has a generally C-shaped cross-section. Guide member 54 has a first side 80 and a second side 82 separated by a base 84. Extending from first side 80 and second side 82 is a first securing flange 86 and a second securing flange 88, respectively. First and second securing flanges 86, 88, respectively, are sized such that a gap 90 remains therebetween. It will be appreciated that tile configuration of guide member 54 defines a channel along the longitudinal length thereof. In this embodiment, as illustrated in FIG. 2, guide member 54 is adapted to cooperate with gear mechanism 44 and slider assembly 46 to allow slide-out compartment 30 to be extended and retracted.

Referring back to FIG. 3, guide member 54 has a first end 124 and a second end 126. Located at first end 124 of guide member 54 is a gear mount 94. At second end 126 is a roller mount 96. It can be appreciated by one skilled in the art, however, that gear mount 94 may be located at second end 126 and roller mount 96 may be located at first end 124. Similarly, it can be appreciated that both gear mount 94 and roller mount 96 may be located at any longitudinal distance along guide element 54. Furthermore, in another embodiment of base assembly 42, gear mount 94 is located at first end 124 and roller mount is located at second end 126, however, base assembly 42 is rotated 180° from that shown in FIGS. 2 and 3 when installed on camper 18.

Gear mount 94 includes two bushing protrusions 98 which extend from respective surfaces of first side 80 and second side 82. An axial gear shaft hole 100 passes through bushing protrusion 98 and the associated first side 80 or second side 82. Axial gear shaft holes 100 are adapted to cooperate with gear mechanism 44, and allow free rotation thereof. Bushing protrusions 98 and axial gear shaft holes 100 are one embodiment of structure capable of performing the function of a connecting means for coupling gearing mechanism 44 to guide member 54. It will be appreciated by one skilled in the art that various other configurations of connecting means are possible. For example, connecting means could utilize gear shaft holes 100 that have the form of a slot that extends to the end of first side 80 or second side 82, distal from base 84. In this embodiment, the slot is capped with a securing flange that closes the open end thereof and attaches gearing mechanism 44 to guide element 54. In another embodiment, bushing protrusions 98 are detachable and secured to guide member 54 by way of one or more fasteners. In yet another embodiment, connecting means comprises of a hole that has an interior tapered form that frictionally retains gear mechanism 44 to guide member 54.

Roller mount 96 includes two axially coinciding roller shaft holes 102 formed in first side 80 and second side 82. Roller shaft holes 102 are capable of cooperating with the components of roller assembly 96. Roller shaft hole 102 is one structure capable of performing the function of connecting means for coupling roller assembly 96 to guide member 54. It will be appreciated that various other configurations of connecting means are capable of performing the function thereof. For example, roller shaft hole 102 may be tapered to cause a friction fit with roller assembly 96. In another embodiment of connecting means, roller shaft hole 102 includes protrusions similar to those of bushing protrusions 98. In yet another embodiment of connecting means, roller shaft hole 102 is a slot.

As depicted in FIG. 2, sliding assembly 46 is disposed in the channel defined by guide member 54 and cooperates with securing flanges 86, 88 (FIG. 2). Slider assembly 46 is attached to slide-out compartment 30, as well as being slidably engaged with the channel defined by guide member 54 and gear mechanism 44. Slider assembly 46, in cooperation with guide member 54, provides the structural support and load bearing members that carry the weight and dissipate the forces resulting from extending and retracting slide-out compartment 30. As depicted in FIG. 4, slider assembly 46 includes slider rails 110 that are coupled to slider supports 112. While FIG. 4 depicts slider assembly 46 as having two slider rails 110 and two slider supports 112, it will be appreciated that various other numbers of slider rails 110 and slider supports 112 could be used.

In one embodiment of slider rail 110, as illustrated in FIG. 5A, slider rail 110 has a raised middle portion 114, with a first securing member 116 and a second securing member 118. First and second securing members 116 and 118, respectively, extend outwardly from the peripheral edges of middle portion 114. Securing members 116, 118 may have various widths, so long as they are capable of cooperating with securing flanges 86, 88 of guide members 54 to retain slider rail 110 within the channel defined by guide member 54. Middle portion 114 includes a number of slots 120 that are configured to cooperate with gear mechanism 44 to allow movement of slider assembly 46. In one embodiment, each slot 120 has a generally rectangular form. It will be appreciated, however, that various other configurations are capable of performing the function thereof. By way of example and not limitation, slot 120 may be round, oval, elliptical or any combination thereof. What is important is that slot 120 be configured to cooperate with gear mechanism 44. In addition, as shown in FIG. 5A, one or more of slot 120 may include a curved section that is capable of accommodating a fastener (not shown) to attach slider rail 110 to a portion of slide-out compartment 30. First end 124 and second end 126 of slider rail 110 have a number of retaining holes 128 formed therein. In one embodiment, retaining holes 128 include an optional threaded portion to allow slider rail 110 to be attached to slider support 112. Alternatively, slider support 112 may be bolted, welded, riveted, or glued to slider rail 110 during fabrication or manufacture.

Referring now to FIG. 5b, an alternate embodiment of a slider rail 110 b is depicted. Slider rail 110 b includes a first element 130 and a second element 132. A slot 133 is formed through the first element 130 and second element 132 that acts as slot 120 of slider rail 110. Alternatively, slot 133 may only passes through second element 132 and first element 132 is a solid piece of material.

The first element is adapted to act as middle portion 114, while the second element acts as securing member 116, 118. Therefore, first element 130 is fixably coupled to the central portion of second element 132 such that slots in each element align to form slot 133. Additionally, fixation of first element 130 to second element 132 leaves the sides 134, 135 of second element 132 exposed such that sides 134, 135 are capable of cooperating with securing flanges 86, 88 of guide members 54 to retain slider rail 110 within the channel defined by guide member 54. It can be appreciated by one skilled in the art that there are various other configuration of slider rails 110 and 110 b that are possible.

Returning to FIG. 4, in one embodiment, slider support 112 has a generally L-shaped configuration that comprises an upper portion 136 and a side portion 138 extending therefrom. Side portion 138 is substantially perpendicular to upper portion 136. It will be appreciated, however, that side portion 138 may extend from upper portion 136 at various other angular orientations. In one embodiment, upper portion 136 of slider support 112 includes two notches 140 that are adapted to cooperated with first and second ends 124, 126 of slider rail 110. Surrounding each notch 140 in slider support 112 are retaining holes 128 that are configured to cooperate with retaining holes 128 in slider rail 110. As such, notches 140 and retaining holes 128 may have various dimensions and sizes so long as they assist in securely retaining slider rail 110 to slider support 112, i.e. allow fasteners to be disposed through retaining holes 128 in upper portion 136 and into retaining holes 128 of slider rail 110.

In one embodiment, both upper portion 136 and side portion 138 of slider support 112 include a number of securing orifices 144 that are formed to accommodate a fastener (not show) used to attach slider support 112 to a portion of slide-out compartment 30. Securing orifices 144, therefore, may have any desirable form, such as but not limited to, circular, angular, slot-like, or the like. Additionally, the fasteners described herein may comprise of various types of fasteners, such as but not limited to, screw, bolts, split pins, and the like.

The cross-sectional configuration of slider rail 110 and slider support 112 may be varied as necessary depending on the particular use thereof. By way of example and not limitation, slider rail 110 and slider support 112 may have various other configurations such as square, rectangular, or the like. Additionally, slider rail 110 and slider support 112 may be fabricated from various types of materials, such as for example, metals, composites, plastics, fibrous material, or the like, so long as the material has sufficient strength for extending and retracting slide-out room 30. In one embodiment, slider rail 110 and slider support 112 are substantially composed of a steel material.

In use of slider system 10, slider rail 110 cooperates with roller assembly 148 as depicted in FIG. 6. Roller assembly 148 includes a roller shaft 150 and a roller 152. Roller shaft 150 is sized to securely fit within roller shaft holes 102 and an axial hole 164 formed through roller 152. Roller shaft holes 102 and axial hole 164 are sized and configured to allow roller 152 to rotate about roller shaft 150. In one embodiment, roller shaft 150 includes two fastening grooves 154 formed in the surface thereof, which are adapted to receive fastening clips 156. Fastening clips 156 and fastening grooves 154 assist in retaining roller shaft 150 within roller shaft holes 102. Various other structures are capable of performing the function of roller shaft 150, fastening clips 156, and fastening grooves 154. For example, in another embodiment roller 152 is configured to cooperate with the underside of middle portion 114 of slider rail 110 so as to self center therein. In another embodiment, roller shaft 150 may be retained within roller shaft holes 102 through a friction fit and roller 152 is configured to rotate axially around roller shaft 150. In yet another embodiment, roller shaft 150 includes pinholes that accommodate split pins or the like, which prevent retraction of roller shaft 150 from within roller shaft holes 102.

Roller shaft 150 may be manufactured from various types of material, such as by way of example and not by way of limitation, metals, composites, plastics, and the like. In one embodiment, roller shaft 150 is composed of steel.

In one embodiment, roller 152 has a generally cylindrical configuration that includes a larger diameter portion 160 and a smaller diameter portion 162. Larger diameter portion 160 of roller 152 is configured to cooperate with slider rails 110. In addition, roller 152 self-centers within the channel defined by guide member 54 upon insertion of roller shaft 150 through axial hole 164. Larger diameter portion 160 and middle portion 114 of slider rail 110 are configured to cooperate so as to allow roller 152 to self center. Consequently, larger portion 160 self-centers on the underside of middle portion 114 of slider rail 110 to provide smooth sliding of slider rail 110 within the channel defined by guide element 54.

Roller 152 is rotatably mounted within the channel defined by guide member 54 as roller shaft 150 passes through roller shaft hole 102 and locates within roller mount 96. In this embodiment, roller 152 has a length sufficient to extend across the width of the channel defined by guide member 54. As such, roller 152 abuts against first side 80 and second side 82 to reduce movement of guide member 54 during use. Additionally, since roller 152 abuts the sides 80, 82 of guide member 54, larger diameter portion 160 is always in engagement with middle portion 114 of slider rail 110. It will be appreciated that roller 152 may take various other forms such as bearing rollers, or the like.

Roller 152 may be composed of various types of material, such as by way of example and not by way of limitation, metal, composites, plastics, and the like. In one embodiment, roller 152 is formed from a plastic material.

As depicted in FIGS. 7 and 8, gear mechanism 44 is adapted to cooperate with slider rail 110. One embodiment of gear mechanism 44, illustrated in FIG. 7, includes a gear shaft 170 and a gear 172. Gear shaft 170 is sized to securely fit within gear holes 100 of guide member 54 with the aid of bushings 174, while being capable of freely rotating within bushings 174. As depicted, in one embodiment, gear shaft 170 has a generally cylindrical configuration. Gear shaft 170 has a first end 180, a second end 182, and an intermediate portion 176 disposed there between. First and second ends 180, 182, respectively, are shaped to allow driving activation assemblies and timing mechanism to be engaged thereto. As shown, in this embodiment, first and second ends 180, 182 are generally square, while intermediate portion 176 is generally cylindrical. It will be appreciated by one skilled in the art that gear shaft 170, first and second ends 180, 182, respectively, and intermediate portion 176 may have various other cross-sectional configurations, such as by example and not limitation, hexagonal, square, octagonal, triangular, oval, or the like. In another embodiment, gear shaft 170 has a generally hexagonal form with two cylindrical portions that cooperate with bushings 174 to allow free rotation of gear shaft 170.

Gear 172 is adapted to cooperate with gear shaft 170. In one embodiment depicted in FIG. 7, gear 172 has a generally cylindrical form with a plurality of teeth 190 extending outwardly from a surface thereof. Teeth 190 are configured to cooperate with slots 120 formed in slider rail 110, as shown in FIG. 8. Returning to FIG. 7, gear 172 has an axial hole 192 that is sized to cooperate with the dimensions of gear shaft 170. In this embodiment, axial hole 194 has a generally cylindrical configuration, however, various other cross-sectional shapes are possible as long as axial hole 194 and intermediate portion 176 cooperate.

In addition, gear 172 has a retaining hole 194 that passes through gear 172 and is sized to cooperate with a retaining hole 184 formed in gear shaft 170. As shown in FIG. 8, when gear 172 is mounted on gear shaft 170, retaining holes 184, 194 align to accommodate a securing pin (not shown). The securing pin (not shown) prevents gear 172 from slipping relative to gear shaft 170 as gear shaft 170 rotates to extend or retract slide-out compartment 30. Alternatively, as shown in FIG. 7 gear shaft 170 and axial hole 192 may have complementary shapes such that the complementary shape limits any slippage which might occur between gear shaft 170 and axial hole 192. Retention clips 156 cooperate with coinciding retaining grooves 198 formed in gear shaft 170 to retain gear shaft 170 within gear shaft holes 100. As illustrated in FIG. 8, gear 172 is disposed in the channel defined by guide member 54 and extends into gap 90 between securing flanges 86, 88. Teeth 190, therefore, engage with slots 120 of slider rail 110.

It will be appreciated by one skilled in the art that various other configurations of gear mechanism 44 are capable of performing the function thereof. For example, gear 172 may be welded, brazed, or joined to gear shaft 170. In another embodiment, gear shaft 170 may include pinholes which accommodate split pins that prevent gear shaft 170 from being retracted from gear shaft holes 100. In another embodiment, gear shaft 170 may include two gears 172 that cooperate with a slider rail having two sets of slots. In still another embodiment, gear 172 may be retained on gear shaft 170, solely through the combination of retaining hole 184, 194 and a securing pin. In yet another embodiment, gear shaft 150 is located through gear holes 100 that are located at second end 126 of guide element 54.

Gear 172, gear shaft 170, and bushing 174, may be manufactured from various types of material, such as by way of example and not by way of limitation, metal, composites, plastics, and the like. In one embodiment, gear 172, gear shaft 170, and bushing 174, are fabricated from steel. While in this embodiment gear 172, gear shaft 170, and bushings 174 are composed of the same material, this is not required.

Referring back to FIG. 2, sliding system 40 is depicted in a fully assembled and operational form. Support elements 50 are coupled to guide members 54 such that guide members 54 rest upon inner portions 62 of support elements 50. Simultaneously, the ends of guide members 54 are attached to outer portions 60 of support elements 50. Support elements 50 and guide members 54 combine to form a square or rectangular base assembly 42.

As shown in FIG. 8, upon manufacture of base assembly 42, gear mechanisms 44 are coupled to respective roller 152, such that gear 172 is substantially centered within the channel defined by guide member 54. It will be appreciated that when assembled, roller 152 is similarly centered within the channel defined by guide element 54. Before slider rail 110 is attached, teeth 190 of gear 172 extend between securing flanges 86, 88, and await engagement with slots 120 of slider rail 110.

Once slider rails 110 are fixably attached to slider supports 112, slider rail 110 is located within the channel defined by guide element 54 such that securing flanges 86, 88 of guide element 54 contact securing members 116, 118 to retain slider 110. In one embodiment, securing members 116, 118 cooperate with wear guides 200 coupled to securing flanges 86, 88. Wear guides 200 separate securing flanges 86, 88 from securing members 116, 118. Wear guides 200 minimize the effects of friction and reduce wear of the securing flanges 86, 88 and securing members 116, 118. It will be appreciated that wear guides 200 may be fabricated from various materials such as plastics, or the like.

As securing members 116, 118 couple with securing flanges 86, 88, middle portion 114 of slider 110 extends through gap 90, thereby allowing slots 120 to engage teeth 190 of gears 172. In this configuration, teeth 190 of gear 172 remain in contact with slots 120 of slider rail 110 throughout the life of sliding system 40. There is, therefore, no possibility of gear 172 disengaging from slots 120 before, during, or after slide-out compartment 30 is extended or retracted. This eliminates the problem with prior sliding mechanisms and systems that disengage during travel of the recreational vehicle, thereby requiring costly repairs and maintenance.

During assembly, slider rail 110 is moved along the channel defined by guide element 54 until the detached end of slider rails 110 extends out of guide channel 92. When this occurs, a second slider support 112, depicted in FIG. 9, is attached to slider rail 110 to thereby form slider assembly 46. Slider supports 112 prevent over extraction of slider rails 110 from the channel defined by guide member 54, thereby preventing over extension of slide-out compartment 30 during use.

As shown in FIG. 9, in one embodiment, sliding system 40 utilizes two gear mechanisms 44 located at first ends 124 of guide members 54. The combination of gear mechanism 44 is considered the gearing assembly of the present invention. It may be appreciated, however, that the gearing assembly may comprise of various other numbers of gear mechanism 44. Additionally, the location of each gear mechanism 44 may be varied so that gear mechanism 44, and so the gearing assembly, may be at any location along the length of guide members 54.

The sliding system 40 as depicted herein encompasses substantially all the structural support members, sliding members, and driving elements within the interior confines of base assembly 42. As such, sliding system 40 of the present invention is compact and has a height that is minimized to reduce the gap formed between the camper's exterior walls and the slider rails 110 of sliding system 40. By so doing, sliding system 40 reduces the area through which wind, rain, sleet, and snow can infiltrate during use if slide-out compartment 30.

Additionally, since all the components are attached to base assembly 64, shown in FIG. 1, sliding system 40 is simple to install on a camper, thereby reducing cost and time for fabricating campers with slide-out compartments. Furthermore, sliding system 40 reduces the required space for apparatus and devices that extend and retract slide-out compartments 30.

According to another aspect of the present invention, as depicted in FIG. 9, gear shafts 170 of gear mechanism 44 are connected by way of a timing assembly 205. Timing assembly 205 includes a drive shaft 210 and a retaining spring 212. Although spring 212 is depicted as being on the right side of sliding system 40, it is contemplated that spring 212 could be on the left side and have equal effectiveness. Drive shaft 210 has a generally elongated form with a first end 214 and a second end 216. Each end 214, 216 of drive shaft 210 has a respective connector recess. One embodiment of first connector recess 218 and second connector recess 220 are depicted in FIGS. 10 and 11. Connector recesses 218, 220 are adapted to cooperate with the respective ends of gear shaft 170. As shown in FIG. 10, first connector recess 218 has an interior configuration having six facets formed therein. In contrast, as illustrated in FIG. 11, second connector recess 220 has an interior configuration with twelve facets formed therein. Each interior configuration is capable of cooperating with either end of gear shaft 170. It will be appreciated by one skilled in the art that various other configurations of timing assembly 205 are possible. For example, timing assembly 205 could include two retaining springs, one on each gear shaft 170 of this embodiment of sliding system 40. In another example, timing assembly 205 is capable of rotating either gear mechanism 44 on either side of sliding system 40.

One feature of the present invention is the ability of drive shaft 210 to be disengaged with respect to one gear shaft 170 attached to one guide element 54, while remaining engaged with a second gear shaft 170 attached to a second guide element 54. In this manner, the timing of sliding assembly 40 and gear mechanism 44 may be adjusted, thereby compensating for any misalignment between slide-out compartment 30 and camper 18 and reducing any binding and wearing of slider rails 10 and slide-out compartment 30.

To time sliding system 40, drive shaft 210 is pushed toward gear shaft 170 having retaining spring 212 proximal thereto. As retaining spring 212 depresses, second end 216 of drive shaft 210 disengages second connector recess 220 (FIG. 11) from a second gear shaft 170. Upon being disengaged, drive shaft 210 may be rotated to turn gear shaft 170, thereby modifying the starting position of gear shaft 170. Upon achieving the desired rotation to time gear shaft 170, drive shaft 210 is released and first connector recess 218 (FIG. 10) engages with gear shaft 170 as retaining spring 212 extends to an extended position.

This configuration also allows the user to compensate for deviations in the squareness of slide-out compartment 30 and camper 18 because second connector recess 220 (FIG. 11) of drive shaft 210 has twelve facets as compared to first connector recess 218 (FIG. 10) which has six. That is, drive shaft 210 may be rotated in increments of {fraction (1/12)}^(th) of a complete rotation. It will be appreciated that connector recesses 218, 220 may be formed with a variety of different internal facets, thereby providing a different number of increments of rotation.

To extend or retract slide-out compartment 30 it is necessary to utilize an activation assembly, such as a manual activation assembly or a motorized activation assembly. Slider system 40 is configured to work with either one. A manual activation assembly 230 is depicted in FIG. 9. Manual activation assembly 230 includes a connector member 232 and a hand crank 234. Hand crank 234 has a generally S-shaped form with a handle 236 at one end thereof and a shaped connector end 238 distal thereto. Shaped connector end 238 releasably couples to connector member 232. Connector member 232 has a first end 240 adapted to hook to gear shaft 170 and a second end 242 that cooperates with shaped connector end 238 of hand crank 234. As such, rotational movement of hand crank 234 is translated along connector member 232 to gear shaft 170.

Connector member 232 may have various lengths and dimensions, so long as it is capable of cooperating with gear shaft 170 and hand crank 234. For example, connector member 232 may have a length sufficient to pass through a portion of exterior walls 24, 26 of camper 18 to engage with gear shaft 170 on either side of sliding system 40. Alternatively, connector member 232 may be integrally formed with hand crank 234. Connector member 232 and hand crank 234 may have various configurations as long as they are capable of cooperating and can translate rotational motion to gear shaft 170.

Alternative to, or in combination with manual activation assembly 230, sliding system 44 may incorporate a motorized activation assembly 250. One embodiment of which is illustrated in FIG. 12. One embodiment of motorized activation assembly 250 includes a gear reduction assembly 252 and a motor 254. Motor 254 is engaged to gear reduction assembly 252. As schematically depicted in FIG. 12, motor 254 includes a drive shaft 330 extending from a body thereof. Motor 254 may take various forms such as an electric, pneumatic, oil, gasoline, or the like. As such, one skilled in the art can identify various types of motor that may be utilized to rotate second end 292 of second gear 260, thereby rotating gear shaft 170 to extend and retract slide-out compartment 30.

Gear reduction assembly 252 includes a connector plate 256, a first gear 258, a second gear 260, and a connector box 266. In one embodiment, connector plate 256 has a generally square shape with a first aperture 268 and a second aperture 270 formed therein. Connector plate 256 further includes a plurality of retaining holes 288 located about the peripheral edge of connector plate 256 that cooperate with a plurality of fasteners (not shown) to allow connector plate 256 to be coupled to guide member 54.

Cooperating with first aperture 268 is first gear 258. First gear 258 has a first end 290 and a second end 292 with a plurality of teeth 294 located therebetween. First end 290 is adapted to be disposed within first apertures 268 of connector plate 256, while second end 292 cooperates with connector box 266. First end 290 includes an interior recess 296 that engages with gear shaft 170, such that rotational movement of first gear 258 rotates gear shaft 170. As such, interior recess 296 may have various forms and dimensions, so long as it is capable of engaging with gear shaft 170.

Second gear 260 is engaged with both first gear 258 and connector plate 256. Second gear 260 has a first end 300, an elongated second end 302, and a plurality of teeth 304 disposed therebetween. First end 300 cooperates with second aperture 270 of connector plate 256, while second end 302 cooperates with connector box 266. Second end 302 is further adapted to cooperate with motor 254 so that rotational motion induced by motor 254 is translated to teeth 304 that are engaged with teeth 294 of first gear 258. Second end 302 of second gear 260 may have various forms as known by one skilled in the art.

In communication with second end 292 of first gear 258 and second end 302 of second gear 260 is connector box 266. Connector box 266 includes a body portion 280, a flange 282 mounted to body portion 280, and a cam lever 332. Cam lever 332 is the only component of a quick release arrangement 330 (FIG. 13) that is visible. Attached to one end of body portion 280 is flange 282. Flange 282, in one embodiment, has the same general configuration as connector plate 250, i.e., includes a first aperture 268, a second aperture 270, and a plurality of retaining holes 274 formed about a periphery thereof. It will be appreciated by one skilled in the art that connector box 266 may have various other configurations, such as round, hexagonal, rectangular, octagonal, trapezoidal, or the like. Additionally, connector box 266 may be fabricated from various types of material, such as plastics, composites, metals, or the like.

Body portion 280 of connector box 266 has a generally square cross-section with an interior 281. Interior 281 of body portion 280 is adapted to accommodate structures described in U.S. patent application Ser. No. 08/887,197 entitled “Quick Release Arrangement for a Camper Jack System,” the disclosure of which is incorporated by this reference. Therefore, interior 281 includes quick release arrangement 330 (FIG. 13) that connects and releases the driving force of motor 254 to second end 302 of second gear 260.

FIG. 13 depicts a cross-sectional view of one embodiment of quick release arrangement 330. A coupler 334 having a bore 335 therethrough is adapted at a top end 336 to engage a lower end 338 of motor drive shaft 340. Motor drive shaft 340 is rotatable on its longitudinal axis but is fixed against vertical movement within body portion 280. Motor drive shaft 340 extends a short distance from coupler 334 and passes through an opening surrounded by a stationary flange 352 into a compartment for coupling with motor 254 in motor housing 255, such that motor drive shaft 340 is directionally rotated by motor 254. Motor 254 resists movement in an opposite direction to the motor's directional setting, and so provides brake control as well as drive control to second end 302 of second gear 260.

Coupler 334 has a bottom end 342 adapted to slidably engage second end 292 of second gear 260. Second gear 260 is also rotatable on its longitudinal axis but is fixed against longitudinal movement within connector box 266. Coupler 334 is configured to securely engage motor drive shaft 340 and second end 302 of second gear 260 such that, when coupled, motor drive shaft 340 and second gear 260 rotate together through operation of motor 254. At the same time, coupler 334 is adapted to slide along the longitudinal axis of motor drive shaft 340 and second end 302 of second gear 260.

It will be appreciated that various means for affecting the slidable engagement of coupler 334, motor drive shaft 340 and second gear 260 could be used. For example, as shown in FIG. 15, bore 335 through coupler 334 is configured to have notched corners 345 to thereby engage with comers 315 of the substantially square-shaped second end 302 of second gear 260 and motor drive shaft 340 such that coupled rotation will occur while still permitting coupler 334 to slide longitudinally along motor drive shaft 340 and second end 302 of second gear 260. To withstand the torque generated by operation of motor 254, coupler 334 is constructed of a strong and durable metal material. Alternatively, in the event that quick release arrangement 330 is used with manual activation assembly 230 or some other manual activation means that do not generate as much torque, a very strong plastic or nylon material could be used, if desired.

In addition to the notched corners 345 within bore 335 of coupler 334, second end 302 of second gear 260 is configured to have beveled edges 341 that correspond to beveled edges 343 formed on a bottom end 342 of coupler 334 such that slidable engagement of coupler 334 and second gear 260 is facilitated.

A spring 348 is positioned to bias coupler 334 to engage with second end 302 of second gear 260. It will be appreciated that various other means for effecting the spring bias force could be used. In one embodiment illustrated in FIG. 13, flange 352 forms the stop for a top end of spring 348, while a protruding shoulder 350 formed on coupler 334 forms a stop for the bottom end of spring 348. The biased coupler 334, in turn, is stopped by a cam member 354 pivotally supported within body portion 280 of connector box 266. Cam member 354 is connected to cam lever 332 on the outside of connector box 266.

Cam member 354 is illustrated in the cammed orientation in FIG. 13 and in the uncammed orientation in FIG. 14. FIGS. 16 and 17 show the relative positions of cam member 354 and second end 302 of second gear 260 in, respectively, the cammed orientation and the uncammed orientation. The relative position of cam lever 332 on the exterior of connector box 266 is also illustrated in FIGS. 16 and 17.

As shown in FIGS. 13 and 16, when cam member 354 is pivoted approximately 90° into the cammed orientation, cam surface 356 is rotated towards motor drive shaft 340 as support surface 358 is rotated towards second end 302 of second gear 260. Since cam surface 356 is farther than support surface 358 from the axis of rotation of cam member 354, as cam member 354 pivots, cam surface 356 forces biased coupler 334 to be cammed against the spring bias force and made to slide along motor drive shaft 340 and, thus, to slide out of engagement with second gear 260. As shown in FIGS. 13 and 16, cam surface 356 ends up supporting coupler 334 at a position slightly above second end 302 of second gear 260. In this manner, motor 254 may be disconnected from gear mechanisms to allow manual activation of sliding system 10, without any braking occurring from motor 254.

Cam member 254 is configured to partially encircle second gear 260 in both the cammed and uncammed orientation. When uncammed, support surface 358 of cam member 354 is located slightly below second end 302 of second gear 260 (FIGS. 13 and 16) such that biased-coupler 334 is supported in the engaged position with second gear 260. Thus, when cam member 354 is uncammed, the spring bias force normally affects coupling of motor drive shaft 340 and second gear 260 through coupler 334 such that both motor drive shaft 340 and second gear 290 are directionally driven, i.e., selectively rotated in a forward or reverse direction by motor (not shown).

Since coupler 334 is biased by spring 348 to remain engaged with second gear 260, the spring bias force must be overcome by the pivoting cam member 354 to effect camming, i.e., disengagement of second gear 260 from coupler 334. Spring tension is adjusted as, for example, by selecting the thickness and flexibility of the material forming spring 348, to ensure that inadvertent release, i.e., inadvertent camming, due to normal vibration and jolting and jarring and, especially, the normal vibration and bouncing and bumping that occurs during travel of the camper, is prevented because the spring bias force is not overcome by these occurrences. On the other hand, when cam member 354 is in the cammed orientation (FIG. 16), there is a slightly increased force on cam surface 358 applied by spring 348 that is tightened as coupler 334 was cammed. Cam member 354 must be constructed to securely support coupler 334 in the cammed direction.

As best shown in FIGS. 16 and 17, in one embodiment, cam member 354 is configured to have a rounded edge 360 between support surface 358 and cam surface 356. Surfaces 356, 358 are smooth and just slightly resilient to permit cam member 354 to smoothly pivot along bottom end 342 of coupler 334. Suitable materials, e.g., moldable nylon and plastic materials, are known in the art. In one embodiment, cam member 354 is constructed from a very strong but resilient nylon or plastic material. One possible product is the plastic known as DELRIN, a product of E.I. du Pont D Nemours & Co., Inc. In addition, this material and similar materials are readily available, moldable, durable and inexpensive. As best shown in FIG. 16, cam surface 356 is configured to have a slight slope 362 toward rounded edge 360 between cam surface 356 and support surface 358. If cam lever 332 is operated only partially, the force of coupler 334 upon sloped surface of cam surface 356 will tend to cause cam member 354 to “flip” back into the uncammed orientation. In this manner, cam member 354 is prevented from resting in a relatively unsafe position that is between the fully cammed orientation and the fully uncammed orientation. When cam level 332 is operated fully, however, cam member 354 is very securely positioned in the cammed orientation.

It will be appreciated that various means for pivotally supporting cam member 354 within connector box 266 could be used. A shown in FIG. 18, one embodiment of cam member 354 is adapted to be added to connector box 266 that is previously unprepared for use with quick release arrangement 330. Cam member 354 is formed with receiving holes 370 for securely receiving a connecting end 372 of cam lever 332 on one side and a bolt-type connector 372 on the opposite end. Bolt-type connector 374, in one embodiment, is made of a sturdy smooth material such as hard nylon or plastic. It will be appreciated that holes may be provided or may be made in connector box 266 to correspond to receiving holes 370 and cam member 354 may then be positioned within connector box 266 with receiving holes 370 aligned with the holes in connector box 266. The bolt-type connector 374 and connecting end 372 of cam lever 332 are passed through the holes in connector box 266 and into respective receiving holes 370 to thereby provide the pivotally supported cam member 354 of quick release arrangement 330. In addition, for ease of removal of cam member 354, small access holes 376 are provided within cam member 354 to connect with receiving holes 370 in a manner that permits the tip of a screwdriver or other small object to be inserted into access holes 376 such that the connecting end of cam lever 332 or bolt-type connector 374 may be pushed out of engagement with the respective receiving hole 370. In one embodiment, cam lever 332 and bolt-type connector 374 are composed of a strong but resilient nylon or plastic material.

Quick release arrangement 330 of the present invention is very safe. Since coupler 334 is biased by spring 348 to remain engaged with second gear 260, the spring bias force must be overcome by pivoting cam member 354 to effect camming, i.e., disengagement of second gear 260 from coupler 334. Therefore, only rotational motion of cam lever 332 will overcome the spring bias force and effect camming.

Referring again to FIG. 12, connector plate 256 and connector box 266 maintain first gear 258 and second gear 260 within first aperture 268 and second aperture 270, respectively. Connector plate 256 and connector box 266 are separated from each other a predetermined distance through the combination of fasteners 310 and spacers 312. Fasteners 310 pass through retaining holes 274 in flange 282 and into spacers 312. Fasteners 310 extend into retaining holes 274 in connector plate 250 that includes, optionally, a threaded portion that engages with the threads of fasteners 310. Alternatively, retaining holes 274 in connector plate 250 are devoid of threads and fasteners 310 pass therethough to attach to guide element (not shown). Various other means are applicable for attaching connector plate 256 to connector box 266. Additionally, there are various other means for attaching gear reduction assembly 252 to guide element (not shown) or other portion of sliding system 40. For example, gear reduction assembly 252 may be bolted, welded, brazed, glued, or integrally formed with sliding system 40.

Both manual activation assembly 230 and motorized activation assembly 250 are structures capable of performing function of driving means for activating said gear mechanism to extend and retract the slide-out compartment. Other structures that are capable of performing the same function, in light of the teaching contained herein, are known by one skilled in the art. Additionally, the combination of manual activation assembly 230 and/or motorized activation assembly 250 with gear mechanism 44 is one structure capable of performing the function of moving means for extending and retracting the slide-out compartment. It will be appreciated that various other moving means are capable of performing the same function, and are known by one skilled in the art.

Referring now to FIGS. 19A and 19B, a alternate embodiment of a slider rail 380 is depicted. Slider rail 110, as previously discussed above, supports the majority of the weight associated with slide-out compartment 30, thereby acting as a load-bearing member. When the size of slide-out compartment 30 increases, however, slider rail 110 carries more load and requires strengthening. One configuration that provides increased strength to slider rail 110 is depicted as slider rail 380. The majority of the features discussed with respect to slider rail 110 also relates to slider rail 380. As shown, slider rail 380 includes a lower slider rail 384 and an upper slider rail 386, thereby forming a load-bearing member. Upper slider rail 382 and lower slider rail 384 are attached together at their respective middle portions 386, 388, thereby forming an I-beam structure. The I-beam construction, as known in the art, is strong, rigid, and capable of providing the necessary support.

Alternatively, as shown in FIG. 19B, a tubular member 390 may be fixably attached to slider rail 384, such that strength is provided while retaining the capability of lower slider rail 384 to engage with gear mechanisms 44. Tubular member 390 is depicted as having a square cross-section, however, it can be appreciated that one skilled in the art can identify various other cross-sectional shapes that are appropriate, such as but not limited to, oval, rectangular, trapezoidal, or the like.

Generally, it will be appreciated that various other configurations of slider rail 380 are possible and other methods may be used to increase the strength of slider rail 380.

The present invention may be embodied in other specific forms without departing from its spirit or essential characteristics. The described embodiments are to be considered in all respects only as illustrative and not restrictive. The scope of the invention is, therefore, indicated by the appended claims rather than by the foregoing description. All changes which corn within the meaning and range of equivalency of the claims are to be embraced within their scope. 

What is claimed and desired to be secured by United States Letters Patent is:
 1. A sliding mechanism for extending and retracting a slide-out compartment of a recreational vehicle having a stationary support portion, said sliding mechanism comprising: (a) a base assembly attached to the stationary support portion so as to provide structural support to the slide-out compartment when it is extended, said base assembly comprising a guide member, said guide member being configured to define an interior channel therein; (b) a slider assembly movably disposed in said interior channel of said guide member, said slider assembly being configured to allow the slide-out compartment to move relative to said base assembly, said slider assembly being configured such that upon being disposed in said interior channel defined by said guide member said slider assembly substantially closes said interior channel; and (c) a gear mechanism configured to drivingly engage said slider assembly so as to extend or retract the slide-out compartment, said gear mechanism comprising a gear member mounted in said closed interior channel.
 2. A sliding mechanism as recited in claim 1, wherein said base assembly further comprises a support element attached to the stationary support portion.
 3. A sliding mechanism as recited in claim 1, wherein said slider assembly comprises: (a) a slider rail disposed within said interior channel defined by said guide member; and (b) a slider support attached to said slider rail, said slider support being attached to the slide-out compartment.
 4. A sliding mechanism as recited in claim 3, wherein said slider rail has a plurality of holes formed therein configured to cooperate with said gear mechanism.
 5. A sliding mechanism as recited in claim 1, wherein said slider assembly and said guide member of said base assembly are configured to cooperate such that said slider assembly is retained within said interior channel in said guide member.
 6. A sliding mechanism as recited in claim 1, wherein said gear member is substantially enclosed by said guide member and said slider assembly.
 7. A sliding mechanism as recited in claim 1, wherein said gear mechanism also comprises a gear shaft rotatably attached to said guide member, said gear shaft being disposed in said interior channel defined by said guide member.
 8. A sliding mechanism as recited in claim 7, wherein said gear member is mounted on said gear shaft.
 9. A sliding mechanism as recited in claim 8, wherein said gear mechanism further comprises a timing assembly.
 10. A sliding mechanism as recited in claim 1, further comprising a driving means for driving said gear mechanism so as to move said slider assembly along said interior channel defined by said guide member to extend or retract the slide-out compartment.
 11. A sliding mechanism for extending and retracting a slide-out compartment of a recreational vehicle having a stationary support portion, said sliding mechanism comprising: (a) a base assembly attached to the stationary support portion so as to provide structural support to the slide-out compartment when it is extended, said base assembly comprises a guide member mounted on said support portion and configured to define an interior channel therein; (b) a slider assembly attached to the slide-out compartment, said slider assembly being movably disposed in said interior channel defined by said guide member, said slider assembly being configured to allow the slide-out compartment to move relative to said base assembly, said slider assembly comprises a slider rail, said slider rail being configured such that upon being disposed in said interior channel defined by said guide member said slider rail substantially closes said interior channel; and (c) a gear mechanism configured to drivingly engage said slider assembly relative to said base assembly so as to extend or retract the slide-out compartment, said gear mechanism comprising a gear member mounted in said closed interior channel.
 12. A sliding mechanism as recited in claim 11, wherein said slider rail has a plurality of holes formed therein configured to cooperate with said gear member.
 13. A sliding mechanism as recited in claim 12, wherein said gear member is configured to drivingly engage said plurality of holes of said slider rail so as to move said slider rail along said interior channel defined by said guide member of said base assembly to thereby extend or retract the slide-out compartment.
 14. A sliding mechanism as recited in claim 13, wherein said slider rail and said guide member are configured to cooperate such that said slider rail is retained within said interior channel defined by said guide member.
 15. A sliding mechanism as recited in claim 11, further comprising a roller assembly rotatably attached to said guide member, said roller assembly being configured to cooperate with said slider assembly.
 16. A sliding mechanism as recited in claim 15, wherein said roller assembly is rotatably mounted in said interior channel defined by said guide member.
 17. A sliding mechanism as recited in claim 16, wherein: (a) said guide member has a first end and a second end; (b) said gear mechanism is rotatably attached to said first end of said guide member; and (c) said roller assembly is attached to said second end of said guide member.
 18. A sliding mechanism as recited in claim 16, wherein said roller assembly is configured to cooperate with said slider rail so as to be self-centering.
 19. A sliding mechanism as recited in claim 17, further comprising a drive mechanism to drive said gear mechanism so as to move said slider rail along said channel in said guide member to extend or retract the slide-out compartment.
 20. A sliding mechanism as recited in claim 19, wherein said driving mechanism comprises a motorized activation assembly.
 21. A sliding mechanism as recited in claim 19, wherein said drive mechanism comprises a manual activation assembly capable of engaging said gear mechanism to extend and retract the slide-out compartment.
 22. A sliding mechanism as recited in claim 20, wherein said motorized activation assembly includes a motor, a gear reduction assembly, and a quick-release arrangement.
 23. A sliding mechanism for extending and retracting a slide-out compartment of a recreational vehicle having a stationary support portion, said sliding mechanism comprising: (a) a base assembly attached to the stationary support portion so as to provide structural support to the slide-out compartment when it is extended, said base assembly comprising a support element connected to the stationary support portion of the recreational vehicle and a guide member connected to said support portion, said guide member being configured to define an interior channel therein; (b) a slider assembly attached to the slide-out compartment, said slider assembly being configured to allow the slide-out compartment to move relative to the stationary support member, said slider assembly comprising a slider rail movably disposed in said interior channel defined by said guide member, said slider rail being configured such that upon being disposed in interior channel defined by said guide member said slider rail substantially closes said interior channel, said slider rail having a plurality of holes formed therein; (c) a gear mechanism disposed within said closed interior channel, said gear mechanism comprising a gear member mounted in said interior channel, said gear member being configured to cooperate with said plurality of holes formed in said slider rail so as to drivingly engage said slider rail thereby extending or retracting the slide-out compartment.
 24. A sliding mechanism as recited in claim 23, wherein said gear mechanism causes said slider rail to move longitudinally along said interior channel defined by said guide member so as to extend and retract the slide-out compartment.
 25. A sliding mechanism as recited in claim 24, where in said guide member comprises a securing flange configured to retain said slider rail in said interior channel.
 26. A sliding mechanism as recited in claim 25, wherein said slider rail is configured such that the longitudinal edge of said slider rail cooperates with said securing flange of said guide member such that said slider rail is retained within said interior channel of said guide member.
 27. A system for extending and retracting a slide-out compartment incorporated within a recreational vehicle having a stationary support portion, said system comprising: (a) a base assembly attached to the stationary support portion of the recreational vehicle, said base assembly comprising two guide members, each of said guide members being configured so as to define a channel therein; (b) a slider assembly movably disposed in said guide member of said base assembly, said slider assembly being configured to cooperate with said guide member of said base assembly so as to allow the slide-out compartment to move relative to said base assembly, said slider assembly being configured such that upon being disposed in said channel of said guide members said slider assembly substantially closes said channel; and (c) a gearing assembly movingly attached to said base assembly, said gearing assembly being configured to drivingly engage said slider assembly so as to extend or retract the slide-out compartment, said gearing assembly comprising a gear mechanism mounted in said closed channel.
 28. A system as recited in claim 27, wherein said slider assembly comprises two slider rails, one of said slider rails being disposed in said channel defined by one of said guide members.
 29. A system as recited in claim 28, wherein each of said slider rails has a plurality of holes formed therein.
 30. A system as recited in claim 29, wherein said gearing assembly is adapted to drivingly engage with said plurality of holes in said slider rail such that activation of said gearing assembly slidably moves said slider rail along said channel in said guide members so as to extend or retract the slide-out compartment.
 31. The system as recited in claim 27, wherein said base assembly further comprises a support element attached to the stationary support portion of the recreational vehicle, said support element extending between said guide members.
 32. A system as recited in claim 27, wherein said gearing assembly comprises two gear mechanisms, each of said gear mechanisms being rotatably mounted in said channel defined by each of said guide members.
 33. The system as recited in claim 32, wherein each of said gear mechanisms comprises: (a) a gear shaft adapted to cooperate with said guide member; and (b) a gear member mounted on said gear shaft, said gear member being configured to drivingly cooperate with said plurality of holes formed in each of said slider rails.
 34. A system as recited in claim 33, wherein said gearing assembly further comprises a timing assembly, said timing assembly extending between each of said gear mechanisms.
 35. A system as recited in claim 34, wherein said timing assembly comprises a drive shaft and a retaining spring.
 36. A system as recited in claim 35, wherein said drive shaft is releasably coupled to said gear shafts of said gear mechanisms.
 37. A system as recited in claim 28, wherein said system further includes driving mechanism to drive said gearing assembly so as to drive each of said slider rails along said channel defined by each of said guide members to extend or retract the slide-out compartment.
 38. A system as recited in claim 37, wherein said driving mechanism comprises one of either a motorized activation assembly and a manual activation assembly.
 39. A system as recited in claim 38, wherein said motorized activation assembly comprises a motor, a gear reduction assembly, and a quick-release arrangement.
 40. A system as recited in claim 39, wherein said quick-release arrangement of said motorized activation assembly comprises: (a) a connector box attached to the recreational vehicle; (b) a cam member disposed within said connector box, said cam member being supported at a pivot axis within said connector box, said cam member having a support surface and an adjacent cam surface, said cam surface being farther from said pivot axis than said support surface, said cam member pivotal between having the cam surface oriented in a first direction and having the support surface oriented in said first direction; (c) a coupler disposed within said connector box and being supported on the surface of said cam member in said first direction, said coupler having a bore therethrough for slidably engaging a motor drive shaft and for slidably engaging a gear drive shaft that cooperates with the sliding mechanism such that rotation of said gear drive shaft effects movement of the slide-out compartment; and (d) a spring positioned and tensioned to bias said coupler toward said gear drive shall to so as cause engagement therebetween, wherein when said coupler is supported by said support surface of said cam member, said motor drive shaft and said gear drive shaft are engaged to thereby activate the slide-out compartment and, when said coupler is supported by said cam surface of said cam member, said motor drive shaft and said gear drive shaft are disengaged so as to prevent sliding of the slide-out compartment.
 41. A sliding mechanism for extending and retracting a slide-out compartment of a recreational vehicle having a stationary support portion, said sliding mechanism comprising: (a) a base assembly attached to the stationary support portion so as to provide structural support to the slide-out compartment when it is extended, said base assembly comprises a guide member mounted on said support portion and configured to define an interior channel therein, said guide member having a first end and a second end; (b) a slider assembly attached to the slide-out compartment, said slider assembly being movably disposed in said interior channel defined by said guide member, said slider assembly being configured to allow the slide-out compartment to move relative to said base assembly, said slider assembly comprises a slider rail, said slider rail being configured such that upon being disposed in said interior channel defined by said guide member said slider rail substantially closes said interior channel; (c) a gear mechanism configured to drivingly engage said slider assembly relative to said base assembly so as to extend or retract the slide-out compartment, said gear mechanism being rotatably attached to said first end of said guide member, said gear mechanism comprising a gear member mounted in said closed interior channel; and (d) a roller assembly attached to said second end of said guide member, said roller assembly being rotatably mounted in said interior channel defined by said guide member. 